Access the Zed-36 Easter Egg on the Episode 3 DVD by going to the Garage, selecting Street Breed and hitting UP on your remote. You should see Kurt Wyde's glasses turn orange and the words "Racer Zed 36" appear on the screen. Hit OK on your remote to go to the Zed 36 "file".

Access Dr.Tezla and Gig from the main Garage screen and then going up above the team doors. You should see an orange Gig appear. Hit OK and you'll be taken to the Tezla/Gig file.

Images
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Accessing Zed-36 in the Garage... Kurt's glasses turn orange

Zed-36 in the Garage

Accessing Dr. Tezla and Gig in the Garage - the orange Gig appears at the top